California Current AQI Today: 15 Cities Ranked (Moderate)
Real-time air quality data for 15 cities in California. Average AQI across the state is currently 58 (Moderate).
Cities in California
Sorted by air quality (best first)
About Air Quality in California
California faces significant air quality challenges due to its unique geography, dense population, and climate conditions. The state contains several air basins that can trap pollutants, including the Los Angeles Basin and the Central Valley, which frequently experience unhealthy air quality. Despite making substantial progress over decades, California still has some of the worst air pollution in the nation.
We monitor air quality across 15 major cities in California using real-time data from the EPA's AirNow network. The best air quality is currently in Riverside with an AQI of 37. The area requiring most attention is Bakersfield with an AQI of 120. Currently, 2 cities have AQI levels above 100, indicating unhealthy conditions for sensitive groups.
Primary Pollution Sources in California
- Vehicle emissions from millions of cars on congested highways
- Wildfire smoke, which has become increasingly severe
- Industrial facilities and refineries
- Agricultural operations in the Central Valley
- Port activity in Los Angeles and Long Beach
- Desert dust and natural sources
Seasonal Air Quality Patterns
Air quality in California varies significantly by season and region. Summer months bring increased ozone levels due to heat and sunlight reacting with pollutants. Fall often brings the worst air quality due to wildfire season and temperature inversions. Winter can see elevated particulate matter in the Central Valley due to wood-burning and fog-related inversions.
Health Impacts
California's air quality issues contribute to respiratory problems, cardiovascular disease, and premature deaths, particularly affecting disadvantaged communities near freeways and industrial areas. The state's diverse population includes many sensitive groups who are especially vulnerable to poor air quality.
Recommendations for California Residents
Californians should monitor local AQI forecasts, especially during wildfire season. Consider investing in HEPA air purifiers for your home. Limit outdoor activities during Spare the Air days. Use the AirNow app for real-time updates. When driving, recirculate cabin air during high pollution periods.
Frequently Asked Questions About California Air Quality
What is the current air quality in California?
The average Air Quality Index across 15 monitored cities in California is currently 58, which is considered moderate. 7 cities currently have good air quality (AQI 0-50).
Which city in California has the best air quality?
Currently, Riverside has the best air quality in California with an AQI of 37 (Good). Air quality rankings can change throughout the day based on weather conditions, traffic patterns, and other factors.
Is it safe to exercise outdoors in California?
With a state average AQI of 58, outdoor exercise is generally safe but sensitive individuals should monitor their symptoms. Check your local city's AQI before strenuous outdoor activities.
How can I protect myself from poor air quality in California?
To protect yourself from air pollution: monitor AQI forecasts daily, limit outdoor activities when AQI exceeds 100, use air conditioning or air purifiers with HEPA filters indoors, consider wearing N95 masks during very poor air quality, and keep windows closed when pollution levels are elevated. Sensitive groups should take extra precautions.